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GB/T 6404.2-2005Acceptance code for gear units -- Part 2: Determination of mechanical vibrations of gear units during acceptance testing (English PDF)

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine of the PRC

Level / Type

National · Recommended

Issue date

September 19, 2005

Implementation date

April 1, 2006

Scope

GB/T 6404.2-2005 (Acceptance code for gear units -- Part 2: Determination of mechanical vibrations of gear units during acceptance testing) is available as an English-translated PDF.

GB/T 6404.2-2005 is the Chinese standard "Acceptance code for gear units -- Part 2: Determination of mechanical vibrations of gear units during acceptance testing".

Its scope clause reads: This Part of GB/T 6404 specifies the methods for determining mechanical vibration of individually housed, enclosed, speed-increasing and speed- reducing gear units.

It specifies methods for measuring housing and shaft vibrations, and the types of instrumentation, measurement methods and testing procedures for determining vibration levels.

Vibration grades for acceptance are included. It does not include torsional vibration measurements of a geared system. This Part of GB/T 6404 applies only to a gear unit under test and operating within its design speed, load, temperature range and lubrication for acceptance testing at the manufacturer's facility.

The gear unit may be tested at another location if agreed upon and operated in accordance with the manufacturer's recommendations. Other standards on vibration evaluation may be required for measuring gear unit vibration in field service.

This Part of GB/T 6404 does not apply to special or auxiliary drive trains, such as integrated gear-driven compressors, pumps, turbines, etc., and power take- off gears.

Note: Acceptance limits for tests of these types of equipment should be independently specified. However, if negotiated, this Standard or other appropriate standards may be applied to such equipment.

Special provisions may be required for vibration measurements: the type of measurement and acceptance level should therefore be agreed between the manufacturer and purchaser. Its clauses include terms and definitions.

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Document preview — GB/T 6404.2-2005

National Standard of the People's Republic of China

ICS: 21.200
Classification: J 17

Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the PRC

Foreword3
1 Scope4
2 Normative references4
3 Terms and definitions5
4 General7
5 Instrumentation7
6 Vibration measurements9
7 Testing10
8 Acceptance values10
9 Test report13
acceleration waveforms15
Annex B (Informative) Effects of the system18
Annex D (Informative) Subjective vibration ratings23
Bibliography25

1 Scope

This Part of GB/T 6404 specifies the methods for determining mechanical vibration of individually housed, enclosed, speed-increasing and speed- reducing gear units. It specifies methods for measuring housing and shaft vibrations, and the types of instrumentation, measurement methods and testing procedures for determining vibration levels. Vibration grades for acceptance are included.

It does not include torsional vibration measurements of a geared system.

This Part of GB/T 6404 applies only to a gear unit under test and operating within its design speed, load, temperature range and lubrication for acceptance testing at the manufacturer's facility.

The gear unit may be tested at another location if agreed upon and operated in accordance with the manufacturer's recommendations.

Other standards on vibration evaluation may be required for measuring gear unit vibration in field service.

This Part of GB/T 6404 does not apply to special or auxiliary drive trains, such as integrated gear-driven compressors, pumps, turbines, etc., and power take- off gears.

Note: Acceptance limits for tests of these types of equipment should be independently specified. However, if negotiated, this Standard or other appropriate standards may be applied to such equipment.

Special provisions may be required for vibration measurements: the type of measurement and acceptance level should therefore be agreed between the manufacturer and purchaser.

2 Normative references

The following documents contain provisions which, through reference in this

Part of GB/T 6404, constitute provisions of this Standard. For the dated references, their subsequent amendments (excluding corrections) or revisions do not apply to this Part. However, the parties who enter into agreement based on this Part are encouraged to investigate whether the latest editions of these documents are applicable. For undated reference documents, the latest editions apply to this Part.

ISO 2041:1990 Vibration and shock - Vocabulary

3 Terms and definitions

For the purposes of this Part of GB/T 6404, the definitions given in ISO 2041:1990, together with the following, apply.

3.1 Non-contact transducer

A transducer which converts a distance or displacement to an electrical signal that is proportional to the distance or displacement.

3.2 Acceleration

A vector that specifies the time-derivative of velocity (ISO 2041:1990, 1.3).

Note: See annex A.

3.3 Displacement; relative displacement

A vector quantity that specifies the change of position of a body, or particle, with respect to a reference frame (ISO 2041:1990, 1.1).

Note: See annex A.

3.4 Frequency response

The output signal expressed as a function of the frequency of the input signal.

The frequency response is usually given graphically by curves showing the relationship of the output signal and, where applicable, phase shift or phase angle as a function of frequency (ISO 2041:1990, B.13).

3.5 GB/T 10087-2018 | GB/T 10086-2018 | GB/T 6404.1-2005 | GB/T 6443-2025 |

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 13 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 6404 · ISO 2041

Cited by

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